I think people are confused about what you want to do. Do you mean you want the buttons on the screen so you can tap them with your toe with the Zaurus on the floor? Seems hard to believe but nothing else seems to make sense with your posts. Some of the previous replies were wandering if you had some pedal gadget that you wanted to interface with the Zaurus. By the way, which Zaurus? Which ROM? I'd suggest you look into Python, and you can Kopsis's Python setup for the Zaurus (search the forums or look in the Python section).
I'll add below some code I found on the web that implements two buttons, one up one down.
All you need to do is repeat three times, maybe.
Example qupdown.py, module Y206 (Python)
Altering a label as a result of button presses - Python Qt
from qt import *
val = 17
def __init__(self, *args):
apply(QMainWindow.__init__, (self, ) + args)
self.vlayout = QHBoxLayout(self, 10, 5)
self.labelValue = QLabel(str(MainWindow.val), self)
self.down = QPushButton("Lower", self)
self.up = QPushButton("Higher", self)
self.connect(self.down, SIGNAL("clicked()"), self.reduce)
self.connect(self.up, SIGNAL("clicked()"), self.increase)
MainWindow.val -= 1
MainWindow.val += 1